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Finding the Third Proportional to 3,970.13 and 5,221.13

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Solution

The third proportional to 3,970.13 and 5,221.13 is: 6,866.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.13 : 5,221.13 = 5,221.13 : x
  2. Step 2: Convert to fraction form
    3,970.13/5,221.13 = 5,221.13/x
  3. Step 3: Cross multiply
    3,970.13x = 5,221.13 × 5,221.13
  4. Step 4: Simplify right side
    3,970.13x = 27,260,146.27
  5. Step 5: Solve for x
    x = 27,260,146.27/3,970.13
  6. Step 6: Final answer
    x = 6,866.32

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.